These birds are controlled via a radio link. Text: Wikipedia Photo: Reuters

Electrodes have to be implanted in the animal's brain and it has to carry a receiver (typically on its back). Photo: Reuters

The electrodes do not move the animal directly, as one would move a robot; instead, they are used to signal its desired direction or action, then stimulate the animal's reward centres if it complies. Photo: Reuters

The electrodes do not move the animal directly, as one would move a robot; instead, they are used to signal its desired direction or action, then stimulate the animal's reward centres if it complies. Photo: Reuters